Apparatus for straining wire.



UNITED STATES PATENT OFFICE.

THOMAS HEWTON, OF DUNEDIN, NEW ZEALAND.

APPARATUS FOR STRAINING WIRE.

SPECIFICATION forming part of Letters Patent. No. 700,044, dated May 13, 1902.

{Application filed July 29, 1901. Serial No. 70,157. (No model.)

T0 at whom it may concern: 7

Beit known that I,"l 1 oMAs HEWTON, miller,

a subject of the King of Great Britain, and a resident of the city ofDunedin, in the British Colony of New Zealand; have invented oer-- tainnew and usefulImprovements in an Ap paratus for Stretching or StrainingWire, of

which the following, taken in connection with the accompanying drawings,is a specification;

The invention aims to construct an appa ratus for stretching orstraining wire, which is especially adapted for pulling in a quantity ofwire, as there is no limit to the amount of wire that can be drawn in. Y

The invention further aims to construct an apparatus for stretching orstraining wire which shall be extremely simple in its construction,strong, durab1e,efficient in its operation, comparatively inexpensive toset up; and to this end it consists of the novel combination andarrangement of parts hereinafter more specifically'described,illustrated in the accompanying drawings, and particularly pointed outin the claim hereunto appended.

In describing the invention in detail reference is had to theaccompanying drawings,"

forming a part of this specification,wher ein like letters of referenceindicate corresponding parts throughout the several views, and in whichFigure 1 is a side elevation of the apparatus in the act of straining orstretching wire Where an amount of wire has to be taken up. Fig. 2 is anend elevation of the-fixed head as used for taking up long lengths ofwire. Fig. 3 is a similar view of the movable head. Fig. 4: is a frontelevation, broken away, of a modified form of apparatus, in which thesliding head is moved by a rack and pinion and the employment of a pawlto maintain the desired position. Fig. 5 is a front elevation, partlyinsection, of amodified form of apparatus, the movable headbeing pushedinstead of pulled.- Y 7 Referring to the drawings by reference-let ters,A denotes the main bar of the apparatus,

and extends in a longitudinal manner and whichmay be provided throughoutits length with the teeth A, or, as shown, the teeth are only provided aportion of the length of the bar A. One end of the bar A is bent up atFhead F is further provided at one side with a wardly or in a verticalmanner, as at A and terminates into a horizontally-extending arm Aforming a fixed head, having the lower face thereof provided with thegrooves A The reference-letter D denotes a concen tric clip and handlefor clipping the wire 0, and the reference-letter B denotes an eccentrio clip for clipping theother wire E. The jclipB is arranged on oneside of the vertical portion A4 of the bar A, and the clip D is ar-.

ranged on the opposite side'of the vertical portion A of the bar "A. Theclips are pivotally connected to the vertical portion A of the bar Abymeansof the pin A I The reference-letter F denotes the movable head,which is constructed of a vertically-extending member, having its lowerportion enlarged, as at F, and provided with an opening or slot F topermit of the sliding of the movable head upon the bar- A. The upperwall of the opening or slot F? is toothed, as The vertical member .11 ormovable swell or. offset F having its upper edge grooved, as at F, toreceive the wireE. At the top of the verticalmember F a clip D ispivoted thereto by means of the pin F The clip D is arranged above theolfset F so it can engage and clamp the wire in position.

The vertical member "F is further provided with an opening F to receivethe loop or oval link'F which is adapted to engage the hooked end G ofthe operating-lever G. Mounted upon the bar 'A is an auxiliary slidinghead G, whichis formed with a slot or opening to permit of the mountingof the head G upon the bar A, and this slot or opening has its top wallsuitably toothed for engagement with the teeth of the bar A and which isindicatedin dotted lines, Fig. 1. The upper end of the auxiliary head Gis pivoted:to the'lever G-by means of the pin G".

. In the modified form of construction shown in Fig. 4 the movable'headF'isprovided with a pinion F mounted upon a pin Fl and further providedwith a pawl E, which is adapted to engage in the rack A the latterforming in this modified construction the in Fig. 1 the main or slidingbarA has one of its edges provided with ratchet-teeth, as set forth.

In the modified form of construction shown in Fig. 5 the movable head Fis pushed along the main or sliding bar A The latteris provided on itsupper edge with teeth A and throughout its length with the openings AThe movable head F is pushed by means of the operating-lever G which ispivoted by means of the pin G mounted in one of the openings A The slotF in the movable head F has its upper wall formed with 'teeth whichengage with the teeth of the bar A In this modified form of constructionshown in Fig. 5 the movable head, as before stated, is pushed by theaction of the lever G instead of being pulled, as shown in Fig. l.

The ends of the wire are cut and twisted by the tools on the lever G,such as the fork G opening G and cutter G which is worked by the lever Hcentering on the fulcrum H.

It is obvious that the auxiliary head B may be on the other side of themovable head F, when the lever G will push the movable head F instead ofpulling it, thus obviating the necessity for the link F and theauxiliary head G may be dispensed with and the movable head pushed, aswill be evident with reference to Fig. 5.

The apparatus is operated by the reciprocation of the lever G, whichcauses a sliding movement to be imparted to the head F, causing the wireto be stretched or strained,.or, in other words, drawing one end of thewire toward the other, and if sufficient wire is now drawn in the endsare twisted up in any of the various ways usually adopted, but if notthe end of the wire E is secured each for a moment by the clip A and theeccentric and handle D, the clip D is loosened, and the head F moved tothe far or outer end of the bar, when the wire is again clipped by theeccentric D, the eccentric D is opened, and the straining is continued,as has been described.

Having now fully described my invention, what I claim as new, and desireto secure by Letters Patent, is-- In a wire-stretcher,alongitudinally-extending main sliding bar having one end bent in avertical manner terminating in a horizontally-extending arm with agrooved lower face, a pair of clips secured to said Vertically-extendingportion of the main bar, a movable head consisting of a vertical memberhaving one side thereof formed with an olfset provided with a groovedupper edge, a clip secured to said movable head above the said groovedoffset, an auxiliary head mounted upon said main bar, a lever pivoted tothe said auxiliary head and adapted to be reciprocated, and suitableconnections between the lever and the movable head for causing theoperation of the latter when the lever is reciproeated.

WILLIAM YOUNG CAMPBELL, HENTON MACAULAY DAVEY.

